Michael Jordan Essays (984 words) - Chicago Bulls,

Michael Jordan Michael Jordan was one of five youngsters destined to James and Delores Jordan. He was conceived February 17, 1963 in Brooklyn. His folks felt that the avenues of Brooklyn were risky to raise a youthful family. So as opposed to attempting to bear the roads of Brooklyn, the Jordan family moved to Wilmington, North Carolina. Michael's dad, James, found a new line of work in Wilmington as a repairman and his mom Delores found a new line of work as a teller at United Carolina Bank. Michael consistently had an eye for baseball. He played as an outfielder and as a pitcher. At the point when he was twelve, he was the top player in his association. By the age of fifteen, he wasn't the star in baseball as he once seemed to be. He was still excellent, however he had lost a portion of his core interest. Afterward, in his secondary school vocation, he dropped baseball to seek after another intrigue. Before long Michael received the sport of b-ball. At the point when Michael arrived at the ninth grade, he went for the b-ball group. Mentor Lynch, Michael's mentor, cut Michael, which thusly may have made the best player alive today. Michael at that point took rehearsing b-ball to another level. He played his sibling Larry at whatever point he could. Michael never expected what might come sooner rather than later. Michael Jordan went to the University of North Carolina as a ball select. Despite the fact that Jordan at 6'5 was a man with potential, he despite everything concentrated extremely hard trying to get decent instruction, while contending in sports. Mike wasn't required to be a star of the Tar Heels, since they had players, for example, James Worthy, Sam Perkins, and Al Wood. Be that as it may, before the finish of the 1981-82 season, Jordan, as a rookie, was an ordinary starter. Carolina arrived at the Final Four with the assistance of Jordan, who had sixteen focuses and driven the group with nine bounce back. In the last twenty seconds, Michael made a title winning shot from the left pattern. In Michael's sophomore and junior seasons, he was casted a ballot College Basketball's Player of the Year. Through Michael's three years at Carolina, he normal 17.7 focuses per game, while keeping up a B normal. After an incredible school vocation, the Chicago Bulls as the third pick of the 1984-85 season drafted Michael. Michael had a colossal effect in the NBA (National Basketball Association). He had such an effect, that he was chosen to be a substitute on the Eastern Division elite player crew. With Michael's developing achievement in the NBA, an ever increasing number of organizations needed to utilize the Air Jordan name. One of the principal organizations to utilize his name was Nike. Nike paid Michael $2.5 million, so they could start a line of shoes known as Air Jordan's ?During the 1987-88 season, Jordan raised his game to another level. The Bulls' status was likewise raised to another level with the increments of Scottie Pippen and Horace Grant. Michael was having another extraordinary season and this was prove when he began the Eastern Division top pick squad.?(Website) He at that point completed the season, driving the Bulls in scoring for 81 games out of the 82 game season. For his endeavors, Jordan was chosen as the Most Valuable Player and as Defensive Player of the Year. All through the remainder of the couple of years Chicago went out of control. They had gotten the best records ever, and with the assistance of Michael they proceeded to win three NBA titles. Michael Jordan reported in the wake of winning his third successive NBA title that he was venturing down from the game he adored. He said that he was worn out on the weights. A few people accept that Jordan's betting obligations made Jordan quit. Others accept that the killing of his dad, which occurred on August 15, 1993, made Jordan quit. There is one last hypothesis that Michael needed to seek after one of his youth dreams, proficient baseball. Michael Jordan declared that he would seek after his fantasy about playing baseball. Jordan joined the Chicago White Sox association. The White Sox checked out Jordan and afterward concluded that he would be best playing with the Birmingham Barons. At the point when Mike hit his first grand slam on July 30,he highlighted the sky respecting

Odysseus (Ulysses) - Ancient Roman and Greek Mythology

Odysseus (Ulysses) - Ancient Roman and Greek Mythology Odysseus, a Greek saint, is the main figure in the epic sonnet the Odyssey, credited to Homer. He is the lord of Ithaca, regularly said to be the child of Laertes and Anticlea, spouse of Penelope, and father of Telemachus. The Odyssey is the account of Odysseus get back toward the finish of the Trojan War. Different works in the epic cycle give further subtleties, including his passing on account of his and Circes child Telegonus. Quick Facts: Odysseus Name: Odysseus; Latin: UlyssesHome: Ithaca, an island of GreeceParents: Father: Laertes (in the Odyssey), however possibly Sisyphus, Mother: Anticlea, girl of AutolycusPartners: Penelope; CalypsoChildren: Telemachus; Nausithous and Nausinous; TelegonusOccupation: Hero; Trojan War warrior and strategistPronunciation: o-dis-syoos Odysseus battled for a long time in the Trojan War before thinking of the possibility of the wooden pony only one case of why wily or sly is connected to his name. He brought about the anger of Poseidon for blinding Poseidons Cyclops child Polyphemus. In reprisal, it took Odysseus one more decade before he could show up home scarcely so as to drive out Penelopes admirers. The Odyssey covers a decades worth of the experiences of Odysseus and his team on their arrival to Ithaca from the Trojan War.

What pressures shaped the nature and timing of decolonisation in Essay

What weights formed the nature and timing of decolonisation in Palestine - Essay Example ine was not considered as a full nation, but instead a casual settlement of non-Jewish Muslims whose impact would undermine the nearness of the territory of Israel. Be that as it may, new powers started to rise which prompted a definitive decolonization of the nation and the present clatter to go into the assembled countries under a full acknowledgment contract. The weights, interests and powers that offered impulse to the opportunity battle in Israel have been ascribed to various variables inalienable in the nation and past. In this paper, different powers and exercises that prompted the last decolonization of Palestine will be talked about to represent the different interests and occasions that happened during the process1. The start of the twentieth century was set apart by huge push and racket to make a Jewish state in the Middle East for the settlement of the Israelis who were living in various nations over the world. The help of Britain and the United States was being looked for the production of a Jewish people group settlement in Middle East in spite of the resistance of the Arab countries2. This prompted the Balfour announcement in 1917 which expanded the expectations of the Israelis that the British and the Americans will at long last help their resettlement in a locale they accepted was their genealogical home3. Prior to this revelation, Arthur Balfour scripted a letter to Lord Rothschild, one of only a handful scarcely any Jewish individuals who had impact and riches to decide the authentic headings of the race. Rothschild had impact among the Americans and the British outside secretary summoned his impact in starting a procedure that will at long last make a Jewish settlement inside the Middle East. In this letter, Balfour pronounced that he will bolster endeavors to make a perpetual foundation for the Jewish individuals inside the zone heavily influenced by the Palestine. He anyway featured that particular shields must be received to guarantee that the non-Jewish Palestinians were likewise given

How to Choose Toulmin Essay Topics

<h1>How to Choose Toulmin Essay Topics</h1><p>The Toulmin paper points are extremely extraordinary and will assist you with dazzling your educator. This can be the first run through in your life that you will have the option to compose a paper. Accordingly, it is significant for you to figure out how to do it effectively.</p><p></p><p>There are a few kinds of exposition themes that are accessible in the internet composing assignments. Along these lines, you have to figure out which one will work best for you. You can peruse this article to discover progressively about these topics.</p><p></p><p>There are many paper points accessible however the most widely recognized ones are the well known ones. These points are for the most part theory, history, writing, political issues, sociologies, and so forth. The subject that you pick relies upon what sort of interests you have. On the off chance that you are keen on legislativ e issues, you can pick a point about politics.</p><p></p><p>It is consistently a smart thought to check the past themes that have been secured by different understudies. This will assist you with settling on the point that you will compose. At times, there are a few expositions that are made up on past topics.</p><p></p><p>The paper points that you pick must be identified with the subject of your course. This is the most significant factor that you have to recollect when you are picking your point. This is supposing that the subject isn't identified with the course, the paper won't have the option to stick out and pull in attention.</p><p></p><p>Try to make sense of what the attributes of every understudy is. This will assist you with determining which understudies will be acceptable and who won't have the option to compose a successful exposition. You can utilize the characteristics of specific understudies whe n you are picking a theme. These attributes will improve you ready to evaluate the themes that you will be using.</p><p></p><p>The article points that you use ought to be applicable to the subject that you are composing. At the point when you pick subjects that are not identified with the course, you won't have the option to make progress. The points ought to have the option to make the peruser need to find out about the theme. It is on the grounds that you have explored about the point enough so you will have the option to compose an article that can arrive at the objective that you are attempting to achieve.</p><p></p><p>It is consistently a smart thought to experience your subject rundown when you are picking the paper themes. Ensure that the points that you are picking are identified with the theme that you are composing. This will make it simpler for you to compose an exposition that won't just meet the desires for your teacher ye t additionally make the perusers mindful of the diverse data that they have about your subject. On the off chance that you put enough exertion and you invest enough energy investigating, at that point you will have the option to come to your goals.</p>

Expository Essay Topics - How to Write About Technology?

<h1>Expository Essay Topics - How to Write About Technology?</h1><p>Technology assumes a huge job in learning and composing a descriptive paper. The personnel or teacher may have a remark about innovation, anyway the peruser must browse the best theme. There are two general classifications of innovation that can be utilized for composing an explanatory paper point. It is possible that either can be picked relying upon the language of the essay.</p><p></p><p>In PC based strategies, the PC makes the author's activity simpler as it permits them to make the exposition on the PC as they would on their own PCs. Numerous secondary teachers are getting increasingly OK with utilizing this technique, as they can proceed onward to further developed courses without improving their articles. PC based strategies require significantly less time to finish than manual techniques, yet they do accompany their own arrangement of issues. All things considered, nu merous guardians will go with the manual strategy which may spare the time and exertion to make a PC based innovation topic.</p><p></p><p>The essential detriment of utilizing PC programs is that there is no input of the decisions that have been made. Understudies are required to take a gander at a few decisions and the PC may just show one of them. Most understudies, particularly those in secondary school, are more open to composing than taking a gander at a PC screen and for this situation it would be better for them to utilize manual methods.</p><p></p><p>Another significant contrast between the two is that with PC based strategies there is no space for mistake. Without steady checks and criticism, blunders can sneak in and make the exposition confused. The best way to keep away from these issues is to really check your exposition before submitting it. You can check and twofold check the punctuation and spelling botches. You can look out for syntactic blunder errors.</p><p></p><p>With a manual strategy, there is consistently space for mistake as there is space for blunder with all paper themes. In any case, the best way to guarantee that all exposition points are sans mistake is to twofold check them before accommodation. The chance of an error never exists. Be that as it may, this gives you more opportunity to edit and address any blunders before presenting the essay.</p><p></p><p>Both innovations can be utilized for informative exposition themes if the educator is sure about which configuration to utilize. The PC based innovation is an extraordinary alternative if the instructor isn't eager to invest the energy to try out the two choices and the understudy has just had the chance to test the interpretive exposition point by composing an article that utilized the PC based innovation. Assuming, in any case, the understudy has not gotten the opportunity to pick an explanatory paper theme dependent on innovation then it is smarter to stay with manual techniques.</p><p></p><p>For informative exposition points utilizing PC based strategies can be useful in light of the fact that the article can be checked through the PC and right any blunders before accommodation. With the manual methods, the exposition should be peruse and edited by the educator and the article may should be improved so as to get all the blunders fixed. The other favorable position of utilizing manual procedures is that they can be changed for different composing circumstances. They don't generally need to be equivalent to long as they are diverse enough from each other.</p>

Research Paper Sample PDF

<h1>Research Paper Sample PDF</h1><p>When you are setting up your exploration paper, you should find out about the distinctive paper types and how they work, and when it is suitable to utilize an examination paper test PDF. Similarly likewise with any exploration paper, there are a few choices accessible that will permit you to tailor your papers for explicit requirements, however there are additionally a few other paper types accessible that are not carefully PDF.</p><p></p><p>The first choice you will need to consider with regards to the paper type is the paper type known as the format paper. This paper is for the individuals who are needing a quick and casual style of composing. They have to have a simple stream to their considerations, and when taking a gander at a design paper, the sort of paper they will need to utilize ought not be the essential format paper or word processor paper. The format paper should have the option to complete t wo things, the first being to permit you to compose, and the second being to keep you organized.</p><p></p><p>The design paper additionally functions admirably on the off chance that you are taking notes on an undertaking and need to show each page and take takes note of that coordinate the composed work. For this situation, the exploration paper test PDF can be utilized as a framework, and can assist you with monitoring your notes and changes, and can even assist you with bettering compose your notes.</p><p></p><p>Another alternative you may consider for your own examination paper is the examination paper test that is full shading. These sorts of exploration papers are perfect in the event that you are searching for a simple to understand position. Much of the time, it is suggested that you research in this organization, as this can make it simpler for you to make sense of data and to find the particular data you have to see.</p> ;<p></p><p>Another research paper choice you may consider for your exploration paper is the article research paper. While this kind of examination paper is more formal than the others, it additionally permits you to utilize a comparative configuration and structure to that of a blueprint. This examination paper has extraordinary advantages, as it gives a similar stream to your composed work that a framework gives, without the need to look into the data and find what you need.</p><p></p><p>The last exploration paper type is the banner introduction. The most widely recognized rendition of this sort of exploration paper is the book index research paper. The list of sources research paper is a rundown of connections and references, that is orchestrated in a way that can be effectively perused and is sorted out as per its time frame.</p><p></p><p>As you can see, there are numerous alternatives for the examination paper typ e, and this incorporates how to arrange your exploration paper and where you can utilize an examination paper test PDF. This all comes down to finding the best examination paper programming program for your specific needs.</p>

Heres What I Know About College English 2 Reflective Persuasive Essay Examples

<h1> Here's What I Know About College English 2 Reflective Persuasive Essay Examples </h1> <p>Reflective exposition tests will exhibit that you're ready to embrace a genuinely casual composing style with a touch of innovativeness. Intelligent composition as indicated by a specific task isn't as straightforward as it might have all the earmarks of being. The blend of research and duplicating admirably can assist you with forming a heavenly article. To make a superb, all around considered paper, you should utilize a diagnostic system and the fundamentals of basic reasoning. </p> <p>Other people accept that it improves innovativeness and profitability at work. Understudies need to create expositions dependent on the educator's guidelines or their favored style recorded as a hard copy. </p> <h2> College English 2 Reflective Persuasive Essay Examples Fundamentals Explained</h2> <p>To help you do that, here are several hints. You can cause your private assortment of inquiries that to can assist you with considering your experience. Ms. Metsker proposed me that I had the option to compose that the overall understudies should be given more assistance. The most captivating issue is I didn't get the best grades in English when I was in secondary school. </p> <h2> Whispered College English 2 Reflective Persuasive Essay Examples Secrets </h2> <p>There are changing perspectives on whether an advanced degree is required so as to have a flourishing life. Most people are slanted to think about the advantages of trainin g in states of a profession. Instruction immediaty affects the quality of life. Consequently, it's imperative to figure out how to move toward any issue with a solid spotlight on settling it. </p> <p>There's no perfect arrangement on the most ideal approach to form a compelling paper. After you choose the subject and pick the situation on which you will base your paper, the rest of the activity would then be able to start. The point of the article is to think about the issue with reality so helpful deductions can be made from the theme. Numerous understudies come online to find influential paper points for higher english basically to pick explicit subjects and start expounding on them. </p> <h2>What You Don't Know About College English 2 Reflective Persuasive Essay Examples </h2> <p>Sometimes there is definitely no need in a consideration grabber at the very beginning, and you may start the content as you need. Commonly, training is a way to a few open doors which each individual should open. You may confide in us to gracefully master help for huge numbers of your scholarly composing needs. On the other side, understudies don't have any decision but to change in accordance with the instruction frameworks. </p> <h2>The Battle Over College English 2 Reflective Persuasive Essay Examples and How to Win It </h2> <p>You see, the shows of English expositions are to some degree more predictable than you may might suspect and, in an assortment of ways, it very well may be as simple as checking to five. You will likewise figure out how to ad lib. Also, you should uncover the manner in which the occasions associate with your experience. Comparative patterns could be seen in movies and discourses moreover. </p> <h2>The Basic Facts of College English 2 Reflective Persuasive Essay Examples </h2> <p>Even in case you're not a capable author, you will be fit for seeing whether the content is ad equate. At the point when you own a rundown of the best transitional words, you're a bit nearer to the best article. Each author that words for AnswerShark is an ace in a particular territory of science that is the motivation behind why they can cover about any subject. You despite everything need to make an exceptional piece of composing. </p> <h2> The 5-Minute Rule for College English 2 Reflective Persuasive Essay Examples</h2> <p>Think of what you know. Models may likewise be remembered for all of the body passages to more help and explain your chief focuses. </p> <p>Do not comprise of anything individual that you're feeling awkward with. All you will require is to make the body out of your exposition in your words and in solid association with the theory articulation. Prior to perusing tests from a definite source, you should verify you are at a protected spot and reflection task models that you're ready to peruse are of high caliber (truly, n o one needs to have a dreadful model). Sporadically you should put an inquiry at first and afterward the appropriate response. </p> <p>You may find a business intelligent exposition on the site. You should simply to get the same number of thoughts as you can. Our hand crafted administration is set up to assist you with picking a custom enticing themes for your school paper when you submit a request with us. The goal of conceptualizing is to help you in getting thoughts. </p> <p>A reflection is making a picture that imparts characteristics to the real article. The suppositions and basic methodology that is appeared by the person towards the subject of the point ought to be altogether founded on legitimate validation. Remember that you need an essential methodology at whatever point you're looking for data for an intelligent paper. Inside my view, it isn't great. </p> <p>It's in reality a reality that the informed have a more noteworthy chance of ma king sure about well-paying occupations and make the abilities required for future work. You will likewise develop inwardly. There are numerous bits of an intelligent report and it is important to form a report in the exact structure. You have to see how to create a viable paper as it is a regular establishment for an understudy's evaluation. </p> <p>Write down everything which you can use as the system of your forthcoming paper. To assist you with creating a profitable article plot here are tips that will have the option to support you. How you arrange your paper depends on the framework. An intelligent exposition is a principal sort of the paper composing work in which an understudy is mentioned to introduce her or his own belief systems on a specific theme through considering the issue. </p> <p>The substance you join into the paper composing. Simply agree to the rules expressed above, and you'll be well headed to composing a generally excellent convincing exposition. As any guide on the most ideal approach to create a convincing exposition will advise you, your paper must be sorted out in sections with a legitimate movement from 1 passage to the following. Powerful exposition models might be accessible on the web, and you may counsel them whenever once you need motivation or have almost no thought of where in the first place your own paper. </p>

The New Fuss About Essay Describing Yourself Samples

<h1> The New Fuss About Essay Describing Yourself Samples </h1> <p>Descriptive Essay on Market can be utilized by vacationers or guests that don't have any earlier comprehension of a commercial center. Layouts like Descriptive Essay about Office can be useful for somebody who's intending to go to an office. Expressive Narrative Essay Example might be utilized for the most part to reproduce a capacity. </p> <p>Although there is certainly not an exact model on the term of your article, you should keep it as brief as conceivable to shield against getting diverted your basic role. Among the focuses to consider when attempting to discover an example exposition about yourself is the bore of the paper. In the occasion the individual who you are talking with utilizes a term or expression you know is annoying, normally, you should not rehash that term or expression. Regardless of whether you have the decision to introduce your piece a title, you are going to need your absolute first sentence to pull the peruser in. </p> <h2>Type of Essay Describing Yourself Samples </h2> <p>There's, clearly, a cutoff on the assortment of pages even our absolute best authors can create with a squeezing cutoff time, however by and large, we can fulfill all the customers looking for critical help. It is desirable over secure proficient composing help from the comparing support. When y ou have addressed that question, you're all set. This inquiry is relatively open-finished, which may make it intense to reply from the start. </p> <h2> The Ultimate Essay Describing Yourself Samples Trick</h2> <p>Prevent the accounts with no exercise learned. You can likewise observe composing models. </p> <p>You may likewise observe totally free works. You can likewise observe article works. You can likewise observe report compositions. You may likewise observe outline works. </p> <h2>Essay Describing Yourself Samples: the Ultimate Convenience! </h2> <p>Various individuals have different techniques for affecting others. Most people would utilize words to influence various people. You should begin telling individual things. Every once in a while, you know yourself more awful than individuals around you so you're ready to confide in them. </p> <h2> Here's What I Know About Essay Describing Yourself Samples</h2> <p>Alternatively, you ought to just pick a right, tame term or expression to offer your response. A self-presentation paper, since the name recommend, is a part of article containing the straightforward insights regarding the author. You can't use it as your own article should be one of a kind, however there's consistently the most ideal approach to discover the paper that will succeed! The principle matter to be careful about in close to home enlightening exposition is that there shouldn't be any over-misrepresentation. </p> <p>These sections must be made out of only a couple of sentences each to turn away any disarray. Inside this segment you will find tests of articles having a place with a few exposition types and habits of organizing. In the absence of such guidelines, it's consistently protected to go for an average five-passage paper. It's made out of one of a kind sections and parts that mirror the general capacity of the review. </p> <p>Keep away from meandering aimlessly and make certain every subject adds to the general article. In the event that you might want to forestall troublesome factious paper points, you may find some fabulous thoughts on this blog. Start with summing up the key thoughts. At that point bounce into the significant subject of the paper. </p> <p>There are sources that can give you test papers to utilize legitimately from their sites while some give space for downloads with the goal that you may utilize the model at your own second. There are two essential sorts of picture depiction. While looking for an individual exposition model, it is in like manner suggested that you think about the states of utilization as illustrated by various sources. Normally, there are a couple of graphic terms and expressions that may be annoying. </p> <p>The utilization of salicylic corrosive is incredibly far reaching likewise, regardless of whether it probably won't be utilized t o fix a wide range of moles. All the above sorts of moles are dealt with nearly with absolutely something very similar. Another method to recuperate pretty much a wide range of moles is cantharidin. There are extra types of moles you probably won't know about, for example, molluscam that aren't commonly due to HPV infection. </p> <h2> The Foolproof Essay Describing Yourself Samples Strategy</h2> <p>From 1 side, it might appear there is nothing less complex than expounding on yourself. Remember this while you build up your contemplations. An individual can say I have a very convoluted nature. You could talk about a compelling individual in your life, however be certain a great deal of the article centers around you. </p> <p>It is a smart thought to make your exposition increasingly positive even in the occasion you want to review a troublesome a great time. On the off chance that don't have any thought what an article delineating your individual ought to incorporate, you may get roused by another person. You can't portray a character till you have assembled the character. With 100 words, it is conceivable to just focus on a few components of your life. </p>

How to Find Postgraduate Scholarship Essay Samples

How to Find Postgraduate Scholarship Essay SamplesIf you're looking for some professional writing assistance, there are a few important topics that you should discuss with a freelance writer, and the best way to find it is through postgraduate scholarship essay samples. A lot of professional writers will have the ability to write a variety of essays for all sorts of college students and applicants, but if you want to get assistance for one specific issue, then you can find some excellent examples to help.You need someone who can help you in case you're trying to get into a school, or tutor awards or scholarships that aren't open to everyone. These services will be able to identify all the best topics that would be suitable for college students, and they'll also be able to help determine what essay you should be writing to go along with the subject. Plus, when you choose to be helped with some assignments, you'll get some sample essays to give your submission an extra boost.The first thing that these writers will do for you is to try to give you some tips on how to approach the particular topic at hand. Some students find it a bit intimidating to try to write essays on a topic they don't know anything about, but you can find articles that can help you to learn about the specific subject so that you can be confident enough to write an excellent, well-crafted essay.The other thing that you can find is several articles that deal with a wide range of subjects, and you can also find them written from the perspective of a teacher or a student that's either new to a particular academic institution or is learning something new. This can be very helpful if you want to stand out from the crowd and don't want to write an essay that looks like it was written by someone who has done this. They can help you better understand the subject matter and it can also give you a greater understanding of what others think about the subject.Many students will find that an article or two that's offered as atutor award is extremely helpful. Some of the types of topics are for undergraduate and postgraduate scholarships, which will be worth checking out. Plus, some individuals will write general information on a subject to which they're associated, and these postgraduate essay samples are always free to use.There are a number of professional writers who are not only able to assist you with writing articles that you need to write, but they're also willing to write essays that you need to write. They have a good deal of experience working with college students and their parents and can help you realize just how much writing can make a difference in your life. Most people have gone through a time when they've been rejected by a college or university, and the application essay is the single most important component in this process.If you're going to be writing the essay, then you should be sure that you spend time studying up on the university's process, what can and can not be used, and the kind of answers you can expect. You can find many articles online that can help you understand what you can expect, and how you should structure your essay. Writing is not a skill that can be learned overnight, and there's no way to go through any topics in an afternoon, but it does require that you have a good amount of patience, as well as a large amount of skill.So, if you're looking for some expert essay samples, then look no further than the postgraduate scholarship essay samples on the Internet. These professionals have years of experience writing these types of academic papers, and you can always expect professional and quality results.

Inventory of the Heacock Family Papers

<h1>Inventory of the Heacock Family Papers</h1><p>Friends Library Swarthmore is situated on the western edge of Swarthmore, Pennsylvania. It contains a plenty of used books, music, TV, and a network center.</p><p></p><p>The Heacock Library is in a piece of town called 'Expressions of the human experience District'. The remainder of the zone is run down and comprises of low-lease town homes and independent companies, which are home to the most unfortunate of poor people. The Arts District is a piece of Swarthmore, where the majority of the land and the vast majority of the organizations are located.</p><p></p><p>Many of the individuals who live in the Arts District are individuals from the Heacock Family, including Maud Heacock, Edna Heacock, and her two girls, Lucy and Sallie. The library is possessed by the Heacock Family, yet most of the books are claimed by the Swarthmore College community.</p><p></p& gt;<p>Some of the Heacock's direct books incorporate, George Armstrong Custer's journals, Letters to Louisa, Letters from Louisa, Historical Collections, An Early Sonnet by Edwin H. Bowler, The Reminiscences of Dr. Samuel Weems, The Early History of Dickinson College, and different books that can be found nearby. Edna Heacock's books can be found at an alternate library.</p><p></p><p>The library of Friends Library Swarthmore is an extraordinary spot for undergrads to meet and mingle. Here you will discover the vast majority of the grounds and libraries on one story. Understudies that are concentrating there might need to attempt to discover books that may assist them with their studies.</p><p></p><p>A parcel of the Students don't have a PC at the Friends Library Swarthmore, so they have numerous focal points here. They might have the option to escape from their PCs for some time and invest some energy studying.</p><p> </p><p>The books and recordings are refreshed each day, making it simple for the understudies to get the most recent books and news. The greater part of the books are on financial aspects, material science, math, PCs, and whatever other points that may intrigue them. The library of Friends Library Swarthmore even has a TV and a radio.</p><p></p><p>The library of Friends Library Swarthmore has numerous books notwithstanding books that are in the files. You may even have the option to discover books on the Internet, which would be exceptionally fascinating to understudies that need to peruse beyond what they can get from their computers.</p>

Upgrade the existing land rover defenders powertrain - Free Essay Example

Upgrade the existing Land Rover Defenders powertrain Introduction The design teams project aim: To propose a program and new engine design to upgrade the existing Land Rover Defenders powertrain The following report discusses weaknesses of the current LR Defender along with a subsequent review of advanced engine technologies. Finally the design targets for the new proposed engine are defined with all necessary parameters calculated and justified. The design team have also considered the cost, manufacturability and marketing affects of the new engine as well as the performance requirements. Benchmarking The current LR Defender engine will be critically analysed in-relation to the vehicles main competitors in the market place. This will allow the weaknesses of the current engine model to be determined and thus rectified for the new specification engine. The engine throughout the following section will be critically analysed in the following main areas; Acceleration speed performance Engine power effectiveness (MEP and power density) Emissions of harmful gases and particulates Fuel economy The potential customer perception of vehicles engine and other performance criterion (including value for money). The following competitor vehicles were researched and compared to the current LR Defender to establish baseline requirements for the new spec engine; Jeep Wrangler Unlimited (regarded as the main competitor) Mercedes-Benz G-Class G550 Nissan Patrol GR Toyota Land Cruiser 3.0 D For a table of the above vehicles full specifications, benchmarked with the existing LR Defender, refer to Fig.4.7 in Appendix.1. Analysis Discussion By reviewing the benchmarking table, Fig.4.7 in Appendix.1, it becomes apparent that the current LR Defender is slower than its competitors by taking 14.7 seconds to reach 0 62 mph compared with the Jeep Wranglers time of 11.7 seconds. Although the LR Defender is not expected to have a very fast acceleration time, as it is an off-utility vehicle, potential customers may be discouraged by the Defenders slow acceleration characteristics compared to the Jeep and its other competitors. The fastest acceleration time is achieved by the Mercedes-Benz G550 which can go 0 62 mph in an impressive 6.1 seconds with its supercharged 5L V8 petrol engine. The cost of the Mercedes-Benz G550 however is 50,250 (compared to 27,610 for the Defender) and has twice the engine capacity of the Defender, so is expected to be far more powerful with its petrol engine compared to the 2.4L turbocharged diesel Defender engine. The design teams proposal is that the current LR Defender engine should at least match or beat its rival the Jeep Wrangler in areas such as acceleration time from 0-62 mph as the Defender is more expensive than the Jeep and approximately 230kg lighter. Another issue is that the Defenders top speed is the lowest out of all its competitors. This low top speed has also attracted criticism from motoring journalist Jeremy Clarkson (2006) who stated that the biggest drawback of the LR Defender is its weak engine and thus corresponding slow acceleration and top speed. The new LR Defender engine must eliminate these same criticisms to become more competitive in the market place and thus more appealing to potential customers. Vehicle Power per cylinder (kW/cylinder) Power Density Ratio (kW/L) LR Defender 2.4L D 4inl 22.50 37.48 Jeep Wrangler 2.8L D 4inl 32.50 46.81 Mercedes Benz G550 5.5L V8 petrol 47.75 70.23 Nissan Patrol GR 3.0 D 4inl 29.50 39.96 Toyota Land Cruiser 3.0D 4inl 30.75 41.25 Fig.1.0 compares the effectiveness of the engines that were benchmarked in detail. It shows that the Defenders current engine has the lowest power density in terms of engine capacity. This is a big weakness as it shows that the when not taking into account the Defenders relatively small engine capacity, its engine is vastly underpowered. The Mercedes Benz G550 as expected displays the best power density as it is a gasoline engine. The Defenders regarded closest rival in terms of target market and image, the Jeep Wrangler, also shows a much greater power density ratio. Or group propose to increase the engines the power density to be comparable with the Jeep Wrangler with at least a ratio of above 43kW/L. Vehicle Torque (Nm) MEP (Mpa) LR Defender 2.4L D 4inl 360 1.885 Jeep Wrangler 2.8L D 4inl 400 1.815 Mercedes Benz G-Class G550 5.5L V8 petrol 391 0.903 Nissan Patrol GR 3.0 D 4inl 380 1.619 Toyota Land Cruiser 3.0D 4inl 410 1.729 A weakness of the current Defender however is highlighted test drive of the vehicle by motor journalist Jeremy Clarkson (2006) for the Times Newspaper. He stated that the vehicle simply did not have enough torque to pull a horse trailer behind it at a reasonable speed. This can be backed up by the data seen in Fig.1.1 above which shows that the current Defender engine produces the least amount of torque out of all its competitors. This weakness is heavily compounded by the fact that the vehicle is marketed as an off-road vehicle and thus needs high torque requirements to be-able to navigate through steep and loose terrain effectively. As a consequence customers may be off put by the fact that the current Defender has less torque than its competitors and thus this issue will have to be addressed when upgrading the existing engine. The new engine must be made more environmentally friendly than the current engine as January 2013 will see the current Euro 5 emissions targets replaced by the Euro 6 legislation and thus stricter emissions targets. The Defender is third best out the five competitors the vehicle was benchmarked against in regards to CO2 emissions, which is an indicator for overall total emission performance. The current Defender comes second best to the Jeep Wrangler in regards to fuel economy, by achieving a combined fuel economy of 28.3 mpg. However the other diesel engine competitors, the Nissan Patrol and Toyota Land Cruiser are less fuel efficient than the Defender. When purchasing an off-road vehicle such as the Defender, fuel economy may not be the most important factor but it has become more important to potential customers over the last decade. The same could be said for the greater importance of emissions performance that potential customers may look for. The new Defender engine is likely to be more powerful and thus a better fuel economy target (comparable to 32.8mpg of the Jeep Wrangler) may be out of reach. However through reviewing and selecting technologies, the fuel economy performance could be improved slightly or at least kept the same. From analysing the Defender, by using the data displayed in Fig.4.7 (Appendix.1), it can be seen that the vehicle is neither the best nor worst performing vehicle in regards to fuel economy, but averagely in relationship to competitors. The balance of the current Defenders inline four engine configuration, according to Nunney (2006), has perfect primary balance because when one pair of pistons are moving up, the other pair are moving down at the same time. Inline four engines however do not have perfect secondary dynamic balance. This is because piston acceleration varies depending on its vertical position within the cylinder head in relation to the crankshaft that it is connected to. This leads to one pair of pistons moving faster than the other, which creates a secondary imbalance and results in the engine vibrating vertically. Nunney (2006) also explains that at low power configurations the secondary imbalance (vibration) is not too severe but can get considerably worse with increasing size and powerful engines. This may explain why the current inline 4 Defender engine has a lower displacement than its competitors, to reduce secondary imbalance vibration in order to appeal to potential customers and save costs on designing a crankshaft to damp heavy engine vibration. The following strengths are also exhibited by the current engine; Highest MEP value out of the competitors benchmarked against Best strength to weight ratio (could be due to basic interior making vehicle lighter) Potential customers may overlook the apparent power and torque shortfalls as the highly regarded Land Rover brand may persuade people to buy the vehicle anyway. Summary of existing Defender engine (compared to competitors); Weaknesses Strengths Slowest acceleration from 0 62 Mph Best Mean Effective Pressure of 1.885Mpa, better than competitor vehicles Lowest top speed of only 82 mph Highest Power to weight ratio (kW/kg) More expensive than Jeep Wrangler by 4000 even with poorer speed performance. Fuel economy is not the worst Lowest Power per cylinder produced (kW/cyl) Emission of CO2 is not the worst Secondary imbalance of straight inline four engine configuration (rivals also have this weakness) Long history of Defender may appeal to potential customers, thus engine shortcomings may be overlooked Lowest torque produced out of competitors Not the best in either fuel consumption or emissions, even with smallest capacity engine Lowest Power Density Ratio (kW/L) Current Vehicle Performance Trends Fig 1.3 shows the performance trends for Jaguar engines up to 2010. While exact performance targets cannot be extrapolated from the graph, The design group can see that the new Defender engine needs to have an increase in specific engine power. However with the increase in power, increased emissions and fuel consumption will occur. This in conjunction with Fig 1.4 below from Richardson (2010) shows how CO2 emissions have decreased despite the trend of engine power also increasing. While the trends from Figs 1.3 and 1.4 show that performance trends increase and emissions trends decrease, the group is concluding that potential customers for a LR Defender will be less likely concerned about the vehicles emissions or fuel economy compared to non-SUV vehicles customers. Thus increasing the torque (and power) of the current engine to match its competitors is prioritised. It is conceded that any improvement in fuel economy and emissions departments will be limited, but in the interests of Land Rovers image, any improvement on these characteristics will be beneficial. Advanced Engine Technology Supercharging Turbo-charging Technology Superchargers (mechanical drive driven) This is a device comprising of an air compressor to force more air into the engine. Forcing a greater amount of air (under positive pressure) into the engine provides more oxygen for the combustion process than without a supercharger. As a result more fuel can be thus provided for stoichiometric combustion reaction to occur and allowing more work per a cycle to be done. This thus increases the power output of the engine. The advantage of supercharging according to Daniels (2001) is that it multiplies the engines BMEP and torque by the amount the air compressor increases the atmospheric pressure into the engine. Supercharged engines also experience better throttle response than naturally aspirated engines. The disadvantage of using a supercharger is that it is generally less thermally efficient than the more common used turbocharger (which uses energy from otherwise wasted exhaust gas). Another drawback highlighted by Harris (2002) is that supercharging (particularly mechanical-supercharging techniques) puts extra strain on the engine and its components as they are required to withstand extra strains provided by the supercharging boost. This requires the engine to be made stronger, thus thicker, heavier and more expensive. Daniels (2001) also explains how the noise generated by a superchargers mechanical drive components can contribute to extra passenger discomfort. Turbochargers These devices consist of a turbine and a compressor and are a type of supercharger. The difference is that instead of mechanically driving a compressor to force more air into the engine, turbochargers uses the engines own exhaust gases (which would have been otherwise wasted). It does this by converting the kinetic energy from exhaust gases into rotational energy to turn a turbine. The turbine is connected to the compressor on the same shaft, thus this powers the compressor to draw in atmospheric air and pump it pressurised into the engine. The advantages of a turbocharger are same as for a supercharger as previously described of increasing engine BMEP. This is appropriate for the LR Defender which will need the extra power if being used off-road or in mountainous steep roads, which is the market the vehicle is targeted to. Turbochargers are also more thermally efficient than superchargers due to use of the otherwise wasted exhaust gas. This thus decreases exhaust emissions and fumes expelled into the atmosphere. Daniels (2001) also explains that for mainly diesel engines variable geometry turbochargers can maintain an appropriate exhaust gas speed though the turbo turbine when the engine is at low load. Disadvantages include the need for a cooler to cool exhaust gas before it enters the turbine therefore adding weight and bulk to the engine. During operation turbochargers also experience a turbo lag when the throttle is applied. As previously explained the LR Defenders competitors (particularly its main rival the Jeep Wrangler) have more powerful engines than the current Defender 2.4litre 4 cylinder engine. If upgrading the engine by increasing its cylinder capacity, more air (particularly oxygen) will need to be supplied to the cylinders for combustion. Thus the use of twin-turbochargers may be required to force more air into the cylinders to make the combustion process stoichiometric. Also the advantage of using two smaller turbochargers (twin-turbo), instead of a larger single turbocharger, is that turbo-lag is reduced. Usually a small turbocharger provides boost at low engine speeds and the second kicks in and supplies boost at higher engine speeds. There are two widely known types of twin-turbochargers called Parallel and Sequential types. When comparing the advantages and disadvantages of mechanically-driven superchargers and turbochargers it was decided to use turbochargers as they are more environmentally friendly and fuel efficient to run. The current engine for the LR Defender uses a variable geometry turbocharger and it is likely the new spec engine will also be turbocharged by the same type of unit. Variable Valve Timing Systems Camless Valve Systems Autoweek Magazine (2005) states that camless valve systems were tested in 2005 by Valeo on two Peugeot 407s successfully under extreme weather conditions and intensive testing. The valves were controlled by individual actuators and powered through solenoids to open and close valves. The advantages of camless systems, explained by Daniels (2001), include the following; Valve timing can be altered to as desired In theory some cylinders could be shut off (at low load) to allow others to run more efficiently Valve timing and lift can be matched to the needs of the engine with an estimated saving of up to 20% on fuel saving. The mechanical design of the engine can be simplified as the usage of a camshaft and other associated valve gear become redundant. The advantages however are currently overshadowed by the power needs of the camless system and the associated complexity and reliability issues if the vehicle has electrical problems. Peter Brown who is vice president of powertrain engineering and design for Ricardo stated in Autoweek Magazine (2005) It comes down to complexity and cost which sums up why camless systems are still not (although many think they eventually will be) utilised in passenger vehicle engines. For The new LR Defender engine camless systems will not be used for the disadvantages described above. Variable Valve Timing Technology Mechadyne International (2006) states that that the use of variable valve train systems can substantially reduce both fuel consumption and exhaust emissions. The amount by which the variable valve train systems reduce fuel consumption and emissions is going to be approximated to 10%. This is because, as the Bosch Automotive Handbook (2007) states, BMWs VALVETRONIC system reduces fuel consumption and exhaust emissions by over 12%. According to the Bosch Automotive Handbook (2007) the following types of variable valve timing technology are available; Camshaft phase adjustment Camshaft-lobe control Fully variable valve timing with camshaft Fully variable valve timing without camshaft Camshaft Phase Adjustment This type of variable valve timing adjusts the phase that the cams are in contact with the levers that open and close the valves. To change the phase of the camshaft small adjustments are made, by electrically controlled actuators, to the camshaft as a function of engine speed. Typically the camshaft can only be controlled to move to two pre-calculated extreme positions. Advantages include greater power, torque and efficiency being experienced for a wider range of engine speeds. Disadvantages to other valve timing methods include the limited range in which the valves timings can actually be altered. Fully Variable Valve Timing with Camshaft These types of systems can vary both valve lift and timing. The lobes on the camshaft have a curved profile which in conjunction with the camshaft being able to move freely laterally, this enables the valve lift and timing to also be varied independent to each other, which is an obvious advantage to the previously limited valve control systems mentioned above. Fully Variable Valve Timing without Camshaft These types of systems are very different, to the previously mentioned, as it replaces the use of a camshaft with either the following types of control methods solenoid (electromagnetic) or electro-hydraulic actuators. The biggest advantage of these systems are that operate independently from the crankshaft and thus this allows the valves to be opened at any time period of the engines cycle. This, as stated by the Bosch Automotive Handbook (2007), offers the greatest degree of freedom for valve timing and thus the greatest potential for reducing fuel consumption. Also deactivation of certain cylinders can be achieved thus allowing the active cylinders to work more efficiently at lower engine speeds. Disadvantages are however that superchargers cannot be installed (without very expensive and complicated design), and while space is saved from not using a camshaft, electrical components can be bulky and hazardous. Also the cost of fully variable valve timing systems means it is unlikely they will be incorporated into The new engine design. Camshaft-Lobe Control In these types of systems it becomes possible for a valves timing to be controlled by three separate camshaft lobes depending on the engine speed. According to the Bosch Automotive Handbook (2007) the one lobes profile is tailored so that valve timing and lift is optimised for the lower to mid engine speed range. Another lobes profile is optimised for higher engine speeds by maximising valve lift and opening times. Systems such as Hondas VTEC and Toyotas WTI use camshaft-lobe control method. Camshaft-lobe shifting types of variable valve timing also share similar advantages and disadvantages to the camshaft phase adjustment method. This type of variable timing (camshaft-lobe control) will be used for the new engine design. This is because it doesnt cost as much (or weigh as much) as the other variable valve timing systems while still being hugely advantageous in terms of performance, fuel economy and emissions control gain. Fuel Injection Systems Common Rail Fuel Injection These fuel systems consist of a common rail tubing system maintained at constant high pressure via a pump. Injectors for each cylinder in the engine are in turn connected to the common rail tubing. The injectors have solenoid valves which are electronically controlled via an engine ECU (Electronic Control Unit) to open and close at the desired timings as explained in detail by DENSO (2005). An advantage of common rail fuel injection is that control of fuel injection (according to Daniels, 2001) is at the injector itself and not at the pump which is the case with other fuel injection systems. Higher pressures can also be achieved thus more fuel can be injected into the cylinder in a shorter amount of time with better fuel atomisation, as described by DENSO (2005), leading to high combustion efficiency and a reduction in emissions. This is important as new emissions targets will have to be met in 2014 with the Euro 6 legislation when the vehicle will be on the market. The main disadvantage of this type of injection technology according to Daniels (2001) is that the injectors are expensive to manufacture and inherently complicated in design. Piezoelectric Injectors (For Common Rail Systems) Instead of using solenoid valves which are more frequently used in common rail fuel injection system, piezoelectric injectors can be used in higher performance engines. These injectors work by using piezoelectric crystals that expand when supplied with an electrical charge and thus opening and closing fuel injection valves. The following attributes of piezoelectric type injectors are common; Greater compact dimensions than solenoid valve injectors. More accurate control over injection timing and fuel volume. Piezoelectric injectors can be used with Accelerometer Pilot Control (APC) to minimise diesel engine vibration at low engine speeds. This is achieved by injecting a small quantity of fuel before the main injection quantity. Piezoelectric injectors can also operate faster with more frequency than solenoid valves (approximately five times faster), which allows greater control over fuel consumption and emissions. The Bosch Automotive Handbook (2007) states that the use of piezo-injectors for common rail fuel systems can reduce emissions by up to 20%. Emissions Reduction Technologies Stanton (2009) from roadtransport.com explains how the European Parliament (EP) and European Commission (EC) have agreed new targets for comply with Euro-6 emission legislation. The new Euro-6 targets will have to be met by vehicle manufacturers and thus the new spec LR Defender by 1st January 2013. This is before the new LR Defender model will reach Job 1 (mid to late 2013). It is therefore important that new and existing technologies are reviewed in Emissions control to meet these targets. In recent years the environmental performance of vehicles influences potential customers more than ever in their buying decision. It is therefore important we maintain Jaguars highly regarded brand image and compete with competitors by meeting the existing (Euro-5) and future Euro-6 emissions targets. Diesel Particulate Filters (DPF) This is a device which is responsible for removing small particulate particles and soot from the exhaust gas of a diesel engine. A DPF is not 100% but is normally found to be over 50% efficient most of the time. A good feature of a DPF is that its function according to torquecars.com (2008) is independent to a catalytic converter thus ensuring a fault in the DPF will not affect overall emissions critically. The advantages of particulate filters are much publicised including removing dangerous small particles from an engines emissions. The two types of DPF, active and passive, have their own advantages and disadvantages. The main disadvantages of DPF, explained by torquecars.com (2008), are highlighted below; The filters can get very hot causing a possible fire safety hazard. To remove a DPF very technical changes have to be made to the affected ECUs to change the sensitivity of sensors in the vehicles engine and exhaust. A DPF can decrease engine performance by at most 10% Bhp. Other Technologies Accelerometer Pilot Control (APC) Diesel engines are known to display harsh chugging and vibration at low engine speed, which can now be minimised through technology called Accelerometer Pilot Control (APC). An APC system, described by Delphi (2008) consists of an accelerometer (microphone) attached to the engine block which listens to the nature of the combustion which may have caused vibrations occur throughout the engine block. An engine management system then minimises the unwanted vibrations and noise by optimising the amount of fuel pilot injected for combustion, in a closed loop system, until acceptable noise and vibration levels are reached. ECU Remapping According to mobilechiptune.com (2007), when we remap an engine ECU we are fine tuning the program that deals with engine performance. Remapping or upgrading an ECU could therefore potentially increase the available engine power and torque. Mobilechiptune.com (2007) also states that remapping a diesel turbo engine ECU will produce 30 50% BHP on exact the specification, where diesel engines give the most impressive power and torque gains available. A remap of the ECU will definitely be required be a twin-turbo (or other technologies) are added to the new engine, however the ECU itself is only likely to achieve small gains in efficiency, fuel economy and emissions. Summary of Chosen Technologies Fig1.5 below shows the selected technologies the group is proposing for inclusion into the new Defenders engine. Fig1.5 also shows estimates of the expected improvement over engine performance, emissions and fuel economy. Also see Section.3 for justification to estimates below. Feature Selected Technology Twin-Turbo (reused exhaust gas Variable Valve train Diesel Particulate Filter Piezo Injectors* Improved ECU Mapping APC Performance, BHP + 20% + 10% 10% + 5% + 2.5% + 2.5% Emissions, CO2 g/km + 5% 10% ~ 0% 10% 2.5% 2.5% Fuel Economy, mpg 10% + 10% ~ 0% +10% + 2.5% + 2.5% *Piezo injectors as opposed to solenoid controlled injectors in a common rail fuel injection system. 3. Selection of Engine Arrangements Modified engine parameters: Total engine capacity 3000 cc. Capacity per each cylinder 500 cc. Number of cylinders 6 Type of engine Diesel engine The target is to improve engine performance (mainly torque) by increasing the number of cylinders from 4 to 6. Although there is a reduction of capacity per cylinder, a net increase in total engine capacity of 600 cc will not only compensate it, but also increases total horsepower produced. Kayne (2009) states that 6 cylinder engines are more suited to towing, off-road, hilly and mountainous areas while experiencing greater throttle response. Bore size is thus reduced from 89.9 mm to 82 mm while retaining the same stroke length. Bore/stroke ratio is 1.15, which is within the range of 1-1.3 for diesel engine. The weight of the current engine is estimated as being 180kg taken from a BMW 2.5L inline 4 diesel engine (plus weight added for turbo) from data compiled by Williams (2006), which is a similar spec to the current Defenders 2.4L turbo inline 4. The new engine is estimated as being 25% larger thus heavier by the same margin, and an additional 50kg for the additional technologies a dded. The new engine weight is thus taken as approximately 300kg. 4. Determination of Design Targets This section of the report provides estimations for the new engines power, torque, fuel economy and emissions characteristics. Below Fig1.7 Shows modifications to the Defenders current engine will affect the new engines power performance. Performance Estimation Feature Estimated affect on engines Performance BHP (%) affect from current Defenders 121 BHP engine Increasing engine capacity by 600cc + 25 % + 30 BHP Upgrading current Turbocharger to a Twin-turbo charger + 20 % + 24 BHP Installing a Variable valve train system Camshaft Lobe Control + 10 % + 12 BHP Decreasing the bore from 89.9mm to 82mm 10 % 12 BHP Adding a Diesel Particulate Filter 10 % 12 BHP Piezo-electric injectors (instead of solenoid valves) in common-rail system + 5% + 6 BHP Miscellaneous; -Accelerometer Pilot Control (APC) -Improved ECU Mapping -Improved intake air flow + 5 % + 6 BHP Total affect in BHP = + 50 % 60 BHP Increase Given the maximum power for previous engine is 121 bhp. Therefore, the new engines maximum power is: Power = (121 + 30 + 24 + 12 12 12 + 6 + 6)bhp = 181 bhp = 135kW Torque and Power at 3 operating conditions: T = 368.5 Nm @ max power (3500rpm) T = 400.0 Nm @ max torque (2000rpm) T = 120.0 Nm @ idle (1000rpm) The Torque at various engine speeds were calculated via using the following equation: Engine power: Pe=2*? *N* T Figure 1.8 shows the estimated power and torque curves for the vehicle. Justification of Targets Estimations While the decision has been taken to increase the engines capacity, increasing the engines power to increase the vehicles acceleration and torque characteristics, the fuel economy and emissions of the engine also has to improve. This is due to more stringent legislation and targets, as well as the expectations from potential customers who expect the engine to improve in every department. It may be said that that increasing the engines capacity from 2.4L to 3L means that the targets of decreasing the fuel consumption and emissions will be difficult. The group would argue however that the current Defenders engine is underpowered compared to its competitors and was consequently the recipient of bad reviews from motor journalists (such as Jeremy Clarkson, 2006). The Defenders potential customer market also may not require huge improvements in fuel consumption and emissions. This is because the Defender is going to be utilised for and marketed as an off-field vehicle with specialist applications such as towing and rough terrain excursions. These categories of vehicles are expected by customers to have poorer fuel economy and emissions than other smaller vehicle types. These customer expectations will therefore be beneficial when designing the engine as while emissions and fuel economy is targeted to at least stay the same, the issue of increasing the Defenders torque can be prioritised. The increase in engine capacity naturally means the emissions and fuel consumption will increase. To overcome this advanced engine technology will be utilised in order to decrease the emissions and fuel consumption. Estimations will be made regarding how much saving (in terms of percentage) the addition of new engine technology will have on emissions and fuel consumption. These savings from selected technologies are justified below. Effect of increasing engine capacity Old Defender engine = 2.4L, new proposed engine = 3L Therefore by comparing the chemical (fuel) energy now available; Increase in performance, fuel consumption and emissions = (3L-2.4L)/2.4L x 100=25% Therefore it is assumed that increasing the capacity by 600cc has a 25% negative effect on fuel economy and emissions. It was also assumed that the engine performance increases by 25%. Upgrade from turbo to twin turbo The fuel consumption and emissions will increase when upgrading to a twin-turbocharger. However the Bosch Automotive Handbook(2007) states that the reuse of exhaust gas to work the twin-turbo can minimise the amount of emissions experienced. Therefore as more exhaust gas will be re-used by the twin turbo (as opposed to a single turbocharger) it is assumed that only a 5% increase in emissions will occur. It is also assumed that a twin-turbo will have a 10% negative effect on fuel economy as the greater fuel volume will be used to correct the air/fuel mix ratio. Installing variable valve train (camshaft lobe control method) According to the Bosch Automotive Handbook (2007), the BMW VALVETRONIC achieves more than 12% saving in fuel economy and emissions. Therefore we have decided to estimate The fuel economy and emissions saving as 10%. This is due to the BMWs system being more flexible than the variable camshaft lobe system the group are proposing to use. A fully variable valve system such as BMWs is not used due to its high complexity and cost, which are not suitable for the price range of the vehicle. Piezo electric injectors According to the Bosch Automotive Handbook (2007) up to 20% savings (likely in extreme cases) can be achieved with piezo-injectors instead of solenoid valve injectors in a common rail fuel injection system. The group has thus conservatively estimated fuel and emission savings at 10%. Miscellaneous factors (e.g improved ECU mapping and APC) have also been factored in albeit these technologies contribute to very little performance gain, at approximately 5% in total. Fuel Consumption Estimation The current Defenders combined fuel consumption is 28.3mpg. This figure will be used as baseline for any changes that will be adopted for the new Defenders engine. Fig 1.9 below estimates the change in fuel consumption by using the estimations from Fig. 1.5 (Section. 2). Feature Estimated affect on Fuel Economy mpg (%) affect from current Defenders 28.3mpg economy Increasing engine capacity by 600cc 25 % 7.075 mpg Upgrading current Turbocharger to a Twin-turbo charger 10 % 2.83 mpg Installing a Variable valve train system + 10 % + 2.83 mpg Decreasing the bore from 89.9mm to 82mm + 10 % + 2.83 mpg Adding a Diesel Particulate Filter ~ 0 % ~ 0 mpg Piezo-electric injectors (instead of solenoid valves) in common-rail system +10% + 2.83 mpg Miscellaneous; Accelerometer Pilot Control (APC) Improved ECU Mapping + 5 % + 1.415 mpg Total affect on mpg = 0% change 0 mpg change The current Defenders combined fuel economy is 28.3mpg. Therefore the new engines combined fuel economy is; Fuel economy = 28.3 mpg The table below compares the new engines fuel economy to competitors; Vehicle Combined Fuel Economy (mpg) Current Land Rover Defender 28.30 Jeep Wrangler 32.80 Mercedes-Benz G-Class G550 12.00 Nissan Patrol GR 26.20 Toyota Land Cruiser 25.02 NEW DEFENDER 28.30 As shown by Fig. 2.0 above, the new proposed defender still has the second best fuel economy out of its main competitors. Only the Jeep Wrangler is more efficient. A net no change in fuel economy is very good considering the power of the engine has been increased. For the vehicles potential market of off-road vehicles, the team has decided that not getting any improvement on fuel economy is acceptable as the current Defender is already more fuel efficient than the majority of its competitors. CO2 Emissions Estimation The current Defenders CO2 emissions are recorded as being 266 g/km. This figure will be used as a baseline to calculate the new Defenders engine emissions. Fig. 2.1 below estimates the change in engine emissions by using the estimations from Fig. 1.5 (Section. 2). Feature Estimated affect on CO2 engine emissions g/km (%) affect from current Defenders 266g/km CO2 emission Increasing engine capacity by 600cc + 25 % + 53.2 g/km Upgrading current Turbocharger to a Twin-turbo (exhaust gas re-use) charger + 5 % + 26.6 g/km Installing a Variable valve train system 10 % 26.6 g/km Decreasing the bore from 89.9mm to 82mm 10 % 26.6 g/km Adding a Diesel Particulate Filter ~ 0 % ~ 0 g/km Piezo-electric injectors (instead of solenoid valves) in common-rail system 10 % 26.6 g/km Miscellaneous; Accelerometer Pilot Control (APC) Improved ECU Mapping 5 % 13.3 g/km Total affect on CO2 emissions = 5 % 13.3 g/km Decrease The current Defenders CO2 recorded emission is 266g/km. Therefore the new engines calculated estimated emission is; Engine emission = 266 13.3 g/km = 252.7 g/km ~ 253 g/km Vehicle Engine Emissions (CO2 g/km) Current Land Rover Defender 266 Jeep Wrangler 227 Mercedes-Benz G-Class G550 322 Nissan Patrol GR 288 Toyota Land Cruiser 214 NEW DEFENDER 253 Fig. 2.2 above shows that the new proposed defender remains third best out its competitors regarding emissions, even with a 5% reduction in CO2 emissions. The addition of a Diesel Particulate Filter (DPF) however will vastly decrease the emissions of harmful small particulates and also NOx emissions. The DPF will not however effect the emission of CO2 according to www.trolleycoalition.org (2002), which is why in estimations of CO2 output, the DPF is considered to have ~ 0% effect of CO2 g/km output. According to the Bosch Automotive Handbook (2007) the DPF can be up to 97% effective, thus it can be assumed that the emission of harmful particulates (and soot) will decrease by up to 95% in the new engine with the addition of the DPF. 5. Determination of Engine Design Parameters Brake mean effective pressure (BMEP) = 4?T/ V Idle 5.03 bar Maximum Torque 16.76 bar Maximum Power 15.41 bar Indicated mean effective pressure (IMEP) = BMEP/ nm We assume mechanical efficiency nm = 0.85, which yields Idle 5.91 bar Maximum Torque 19.71 bar Maximum Power 18.13 bar Friction mean effective pressure (FMEP) = IMEP BMEP Idle 0.89 bar Maximum Torque 2.96 bar Maximum Power 2.72 bar To determine compression ratio, CR: CR = VBDC / VTDC = 500cc / 28.52cc = 17.53 The other design parameters at the three power conditions are summarised in the table below. Design Parameters General Idling Max. Torque Max. Power New Engine Weight approx. (kg) 300 Weight to Power (max) Ratio, Mo (kg/kW) 2.3 Dimension Power Ratio, Vo 0.000023 Compression Ratio, CR 1.15 Power, Pen (kW) 12.57 83 131 Torque, T (Nm) 120 400 245.6 Engine Rotation Speed (rpm) 1000 2000 3500 Mean piston speed, Vm (m/s) 3.15 6.31 11.04 IMEP (bar) 5.91 19.71 18.13 BMEP (bar) 5.03 16.76 15.41 FMEP (bar) 0.89 2.96 2.72 GMEP (bar) 9.91 24.71 24.13 Power Density (in terms of capacity), PL (kW/L) 4 35 44 Power Density (in terms of piston area), PF (kW/cm2) 397 3282 4134 The equations used in all calculations are shown below: Swept Volume per cylinder, Vs = (?*B2*S)/4 Piston Area: Ap = Vs/S or it can be calculated as Ap= (?*B)2/4, Engine Capacity, Ce = Vs*Nc where Nc denotes the no. of cylinders Engine power: Pe=2*? *N* T Brake Mean Effective Pressure, BMEP = 2*?*T/ Vs Mechanical efficiency, ?m =BMEP/IMEP Mean Piston Speed, Vm = (S/30)*n S = engine speed n = number of strokes Friction Mean Effective Pressure, FMEP = IMEP BMEP Gross Mean Effective Pressure, GMEP = IMEP-PMEP Power Density (using Capacity), PL = Pen /Vt (kW/L) PE = Engine power Vt = Total engine capacity (Litres) Power Density (using Piston Area), PF = Pen /(iAp) (kW/cm2) PE = Engine power i = Number of Cylinders Assumptions made during calculation: T = 368.5 Nm @ max power (3500rpm) T = 400.0 Nm @ max torque (2000rpm) T = 120.0 Nm @ idle (1000rpm) To determine clearance height, hc: Given compression ratio for previous engine is 17.5, capacity per cylinder is 600cc and bore diameter, B = 89.90mm. CR = VBDC/ VTDC 17.5 = 600/ VTDC VTDC = 600/ 17.5 = 34.285 cc VTDC = (?*(B)2/ 4)*hc 34.285 = ?*(8.99)2hc hc = 0.54 cm = 5.4mm Below the P-V and P-are plotted for the 3 operating conditions of the engine; 6. Engine Operating Dynamics Load Flow Diagram Forces that act upon piston and conrod can be split into normalized pressure load, fg and normalized inertial force, fj. The combination of these two forces yields the real resultant force. The formulae for the two forces are: f_j=(m_j r?^2)/((?B^2)/4) (cos?+?cos2?) And f_g=(P/V)^1.4=22.5/[A_pr(1-cos?+0.075cos2?)]^1.4 Finally, the resultant force is f=f_j ?+f?_g The following parameters are required to calculate resultant forces. Reciprocating mass is given by: m_j=m_p+m_l=m_p+(m_l (l-l^))/l=0.45+(0.6(157.7-105))/127.7=0.65 kg Piston Area is given by: A_p=(?B^2)/4=((0.082)?^2)/4=0.00528 m^2 And radius of crankshaft, r = 47.3 mm, length of connecting rod = 142mm. The following load flow diagrams were thus produced for three engine conditions; Speed Diagrams of Main Components The speed diagram for piston, conrod and crankshaft are drawn using acceleration and velocity relationships with respect to crank angle, ?. The formulae are as follow: Velocity: v=sin+?/2 sin2? Acceleration: a=cos?+?cos2? ? is ratio of crankshaft radius over conrod length which is assumed to be 0.333. The following speed diagram is thus acquired using Matlab: Load on Engine Body (Head/bottom/block) To get the maximum load possible, maximum power parameters were applied where the rpm would be 3500rpm. Below are the equations used to calculate reciprocating inertial load on cylinder block: R_j1=F_j/2+T_kj/b=F_j/2+F_jr/b=F_j (1/2+r/b)=-m_j r?^2 (cos?+?cos2?)(1/2+r/b) And R_j2=F_j/2-T_kj/b=F_j/2-F_jr/b=F_j (1/2-r/b)=-m_j r?^2 (cos?+?cos2?)(1/2-r/b) Rj1 and Rj2 represent the reaction forces at 2 bottom ends of the cylinder block. Figure 8: The following graph displays a comparison of loads at different operating conditions, namely idling (1000 rpm), maximum torque (2000 rpm) and maximum power (3500 rpm). 7. Mass Distribution and Engine Balance As the team has decided to use an inline 6 Engine configuration to replace the current Defenders inline 4 which will require the crankshaft to be re-designed and balanced. An inline 6 configuration was chosen because it is the best balanced engine configuration. In an inline 6, there are three pairs of pistons which move in the same direction, being 120 degrees apart from the other pairs. The reciprocating and rotating masses of engine components produce large inertial forces. These forces generate vibrations leading to greater frictional wear of the engines moving components. To see the extent of any imbalances, the forces generated from the rotating and reciprocating masses were broken down into x-y coordinate directions. The inline 6 crankshaft is essentially the combination of two 3 cylinder crankshafts joined together. Thus the analysis was carried out on half the inline 6 crankshaft to make calculations simpler. Selected Firing Sequence 1 5 3 6 2 4 Balance of Reciprocating Mass Force analysis The result of the force balance above indicates that there is complete balance of the engines reciprocating masses. Moment analysis When considering the reciprocating local moments, we get the following results; ? M?_X=M_l cos60-M_r cos60 = am_j r?^2 [3/4 cos?+?(?3)/4 sin-3?/4 cos2?-?(3?3?)/4 sin2?] ? M?_y=M_l cos60+M_r cos60 = am_j r?^2 [3/4 cos?-?(?3)/4 sin+3?/4 cos2?+?(?3?)/4 sin2?] It is calculated that the reciprocating mass is not fully balanced, and cannot be balanced by the crankshaft or engine. Support engine mounts are thus used, to cancel out the unbalanced reciprocating masses, preventing the engine from turning over. Balance of Rotating Masses Force analysis X-axis: Y-axis: The force analysis shows that the rotating forces are automatically balanced by the crankshaft itself. Moment analysis The results of analysing the rotating masses on the crankshaft are summarised below; X-axis: M_x=Fr2acos30+Fracos30=(3?3)/2 F_r a Y-axis: M_y=F_r2a+Fr2asin30-Frasin30-F_ra = ( 3)/2 F_r a Total Moment? Thus the moment is unbalanced. Therefore from the calculations above it can be seen that there is a resultant rotating moment on the crankshaft due to the crank pin. To balance this rotating motion, web balancers are required. A summary of the calculations to determine the mass of the web balancers required is described below. The Application of Web Balancers To balance the rotating mass, the design team will use 8 web balancers as shown by the configuration in Fig. 3.3 which illustrates the locations for only half the crankshaft. This however is not the best method of balancing an inline 6 engine, which is to use 12 web balancers in total. However to save weight on the engine a compromise was chosen to use 8 web balancers instead. The following equations and method was used to calculate the mass of the balancers; m_r=m_c+m_2=m_c+ml/l = 1.6kg thus, Therefore the weight of each mass web balancer must equal 0.69kg Engine Torque fluctuation Torque due to reciprocating mass If it assumed that T1 is a the torque resulting from one of the reciprocating masses, we get; T_1=F_jrsin?(?+?)/cos?(?) Where ? denotes the angle between the upward direction and the conrod, ?=47.3/141.9=0.3333 r (length of the crank) =47.3mm Fj is the reciprocating force on piston ? F?_j=(m_j )?^2r(cos?+?cos2?) =13429.7(cos?+0.3cos2?) A_p=(?B^2)/4=((0.082)?^2)/4=0.00528 m^2 Torque due to gas pressure It is assumed that T2 is the torque in one cylinder due to gas pressure acting on it: T2=PApr(sin?+0.15sin2?) f_g=(P/V)^1.4=22.5/[A_pr(1-cos?+0.075cos2?)]^(-1.4) Torque Fluctuation Graph The torque due to the gas pressure is small compared with the reciprocating mass. The total torque is therefore; The torque fluctuation in a single cylinder is thus given by the following Flywheel Design The equation to calculate the inertia of the flywheel is given below; If = (900/?2) *[(? )/ (? n2)] Where; I_(f ) Inertial moment of flywheel (kg m^2) ? Fraction of rotating mass of the total engine (assumed to be 0.8) The net work that can be stored in the flywheel and is 280 NM in the design. ? Engine speed unevenness, assumed as 1/50 in this design. I_(f )=(900/?^2 )*[0.8*280/(?2000?^2*1/50)]=0.255 To calculate the inertia of the flywheel we also have the following relationship: Where; G flywheel mass D flywheel diameter The flywheel for initial calculation is assumed to be a thick disc of uniform shape. The material chosen is a Titanium Alloy with a density of 4420kg/m^3. Where; ? Density h Height of flywheel and is assumed to be 25mm, r Radius of flywheel The equation yields that the flywheel radius, r =165mm. The flywheels design however will mean that it is thinner in its centre than outer diameter, as many modern flywheels are designed. The mass distribution of the flywheel was thus recalculated using the following formulae; We get the following dimensions for the flywheel; R2=126mm, R1=195mm, r=165mm G= ?h?r^2=4420 x 0.025 x 3.142 x ?(0.165)?^2=9.9kg Therefore the mass of the flywheel is 9.9kg. A SolidWorks representation of the flywheel is shown over the page with an engineering drawing. 8. Design Sketches 9. Valve Train Design For new engine: 3.0L Diesel 6 cylinders in line Camshaft arrangement type: DOHC Number of valve each cylinder: 4 Valve type: poppet Design Arrangement Double over head camshaft (DOHC) DOHC, compared to SOHC engines according to angelfire (2007), run cooler, more smoothly, quietly and efficiently, because the engine has twice as many intake and exhaust valves as a SOHC engine. The disadvantages, however, are that DOHC engines cost more for repairs. To ensure against expensive engine repairs, the engines timing belt must be changed about every 60,000 miles. Chain drive Chain drive is able to take high load and is quite durable and reliable (the max torque of the new engine is 400Nm). Four valves per cylinder. Using mushroom-shaped poppet valve, it has very good characteristics on cost, fluid flow, sealing, lubrication, and heat transfer to the cylinder head stated by Stone (1999). Variable Valve Timing (VVT) The new engine arrangement will have camshaft lobe control with 3 different lobe profiles available for valve timing to be optimised at different conditions. Design Requirements Valve overlap time In terms of the effect of the valve overlap on engine operation, large turbocharged engines for specific operating conditions can have a valve overlap of about 150. At a full-load operating condition the boost pressure from the compressor will be greater than the back-pressure from the turbine. So the large valve overlap allows a positive flow of air though the engine. This explained by Stone (1999) ensures excellent scavenging and cooling of valves, turbine and combustion chamber with high thermal loadings. Valve seat inserts are required (especially for Al. alloy cylinder block to ensure minimum wear). The centre of the cam is offset from valve axis so that the poppet valves can rotate in order to even out any wear, and to maintain good seating Valve dimensions (from Stone, 1999) The diameter of inlet valves is larger than that of exhaust valves. For a flat four-valve head, each inlet valve could be 39% of the bore diameter and each exhaust valve could be 35% of the bore diameter. (Gives about a 60% increase in total circumference, or 30% increase in curtain area, for same Lv/Dv) At the inlet side the division between the two valve ports should have a well-rounded nose. For the exhaust side division wall cam taper out to a sharp edge. Variable valve timing (VVT) The greater valve overlap takes fuller advantage of the pulse effects that can be particularly beneficial at high engine speeds (also for turbocharged diesel engines). Although there is some limitation for compression ignition engines: At top dead centre: the piston to cylinder-head clearance At bottom dead centre: the inlet valve has to close soon after BDC, otherwise the reduction in compression ratio may make cold starting too difficult The range of valve leads and lags (from Xu, 2009) For best engine performance Intake Open: 10 30 lead Intake Close: 45 75 lag Exhaust Open: 45-75 lead Exhaust Close: 10-30 lag For low exhaust emissions Intake Open: 2 10 lead Intake Close: 30 45 lag Exhaust Open: 30- 45 lead Exhaust Close: 2-10 lag Valve timing maps for the upgraded engine According to the design requirements above, the degrees of the leads and lags are defined based on the engine speed. The faster engine operation, more air need for combustion so lead and lag of the intake valve should increase with the increase of the engine speed. In addition, the more exhaust flow, the more power generated by the engine turbo (because the new engine is twin-turbo charged). For idling at 1000 rpm: At the idling speed, engine does not need too much air for combustion, so the valve overlaps of TDC and BDC are defined as 10 and 60 respectively for the engine efficiency improvement, as shown in Fig. 4.3. Intake Open 5 lead Intake Close 30 lag Exhaust Open 30 lead Exhaust Close 5 lag For the max torque at 2000 rpm: The maximum torque is reached when the engine speed is at 2000 rpm, the overlaps increase to 30 and 100 respectively, see Fig. 4.4. Intake Open 15 lead Intake Close 50 lag Exhaust Open 50 lead Exhaust Close 15 lag For the max power at 3500 rpm: At this moment, the valve overlaps arrive at maximum (40 and 120 respectively) because of the max power output, as shown in Fig. 4.5, and also the emissions will be the highest. Intake Open 20 lead; Intake Close 60 lag Exhaust Open 60 lead Exhaust Close 20 lag 10. Conclusion To conclude the design team feels that the engine upgrade described in this report improves on the performance and thus marketability of the current Land Rover Defender engine. The fuel economy stayed the same (even though the power increase of the engine) and emissions output has been improved although not to a great extent as vehicles such as the Defender are not expected to have the best fuel economy or emissions standards by potential customers. However keeping at least the same fuel economy and emissions is good for the Land Rover company image while there is an increase in power. The following main parameters define the engine; The following advanced technologies were incorporated; Twin-turbocharger Variable valve train (Camshaft lobe control system) Diesel Particulate Filter Piezo-injectors for common rail fuel injection system (old engine used solenoid valves) Improved ECU mapping (tighter control) Acceleration Pilot Control The following compares the performance figures for the new engine against the old engine; Performance Area NEW ENGINE OLD ENGINE Percentage Improvement (%) Power, BHP, (kW) 181 (135) 121 (90) 50% Torque, Nm 400 360 11.1% Fuel Economy, mpg 28.3 28.3 0% Engine Emissions, CO2, g/km 253 266 5% The following points below have to be taken into consideration; Increased weight of engine from 200kg to 300kg. However the current Defender model is its lightest among competitors and still will be with the new engine. A larger engine means greater manufacturing costs, however the increased vehicle performance and, as Abeles (2004) explains, the fact that new car prices rise yearly means the increased manufacturing costs could be incorporated more easily. Appendix 1 Full Benchmarking Table Engine Parameters Land Rover Defender Jeep Wrangler Unlimited Mercedes-Benz G-Class G550 Nissan Patrol GR Toyota Land Cruiser 3.0 D D-4D C Layout 4 cyls In Line , 2401 cc diesel 4 cyls In Line , 2777 cc, turbocharged diesel 5439cc V8 petrol, supercharged 2953cc di longitudinal inline 4 turbocharged 2982cc Longitudinal inline 4, diesel, Turbocharged Max power [emailprotected]/* */ 174hp/130kw @3800 512hp/382kw @ 6000 RPM 158hp/118kw @3600 170hp/123kw @3400 Max torque [emailprotected]/* */ [emailprotected]/* */ 391nm @ 2800 RPM 380 [emailprotected]/* */ [emailprotected]/* */ Installation F Longitudinal F Longitudinal Longitudinal F Longitudinal longitudinal inline 4 Bore/stoke 89.994.6 mm 94.0100.0 mm 97 X 92 mm 96.0102.0 mm 96.0103.0 mm Compression ratio 17.5:1 17.5:1 10.7:1 17.9:1 17.9:1 Ignition and fuel Common-rail injection. Variable geometry turbocharger. , Diesel common rail direct injection indirect injection indirect injection Valves dohc 4 valves per cylinder dohc 4 valves per cylinder dohc 3 valves per cylinder dohc 4 valves per cylinder dohc 4 valves per cylinder Power to Weight Ratio 22.38:1 kW/kg 30hp/kg 16.19:1 kW/kg 21.7hp/kg 18.68:1 kW/kg 0.0872 PS/kg Other Parameters Price 27,610 23,250 50,250 26,040 29,000 0-62 mph 14.7 sec 11.7 sec 6.1 sec 15.2 sec 12.7 Max Speed 82 mph 112 mph 131 mph 99 mph 109mph Body Dimensions (L*W*H) 3894*1790*2021 mm 4751*2030*1840 4680*1864*1931 5030*1940*1855 4410*1800*1860 Weight 1797 kg 2030 kg 2456 2495 kg 2125 kg Wheelbase 2360 mm 2947 mm 2850 mm 2970 mm 2460 mm Fuel Tank 60 L 80 L 96 L 135 L 87 L Combined/Urban 28.3 / 22.6 mpg 32.8 mpg/ 12/11 mpg 26.2 mpg/ 25.02 mpg/ CO2 Emissions 266 g/km 227 g/km 322 g/km 288 g/km 214 g/lm Suspensions live beam axle, single rate coil springs, telescopic hydraulic dampers live axle, leading arms, track bar, coil springs, gas shocks, stabiliser bar rigid axle, coils, shocks, sports suspension solid axle, 5 link, coil springs, stabiliser bar rigid axle, coil springs, stabiliser bar, panhard rod Steering Type power assisted, worm and roller recirculating ball, power assisted recirculating ball power assisted recirculating ball, power assisted recirculating ball, power assisted Turns Lock to Lock 3.4 3.1 3.4 3.1 Front Brakes 298mm solid discs ventilated discs 302mm ventilated discs ventilated discs ventilated discs Rear Brakes 298mm solid discs discs 316mm ventilated discs ventilated discs ventilated drums-in-discs Front Wheel Tyres 235/85 R16,5.5J x 16 in 255/75 r17 285/55 r18 265/70 r16 265/70 r16 c Rear Wheel Tyres 235/85 R16,5.5J x 16 in 255/75 r17 285/55 r18 265/70 r16 265/70 r16 lt Appendix 2 Nomenclature S Stroke (mm) B Bore size (mm) r Radius of crank (mm) ? Angular speed (rad/s) ? Crank angle (o) n speed of crank (rpm) Vs Swept volume (m3) CE Engine Capacity (m3) PE Engine Power (kW) hc Clearance Height (mm) IMEP Indicated Mean Effective Pressure (bar) BMEP Brake Mean Effective Pressure (bar) GMEP Gross Mean Effective Pressure (bar) FMEP Friction Mean Effective Pressure (bar) ?m Mechanical Efficiency Vm Mean Piston Speed (m/s) a Acceleration (m/s2) v Velocity (m/s) mj Reciprocating mass (kg) mp Piston mass (kg) ml Conrod mass (kg) fj Normalised Inertial Force (N) fg Normalised Load (pressure) (N) f Sum of gas pressure and inertial load (N) Rj1, Rj2 Reciprocating load (reaction forces) on cylinder block on both sides (N) bhp Brake horse Power (kW) References Author Unknown, motorera.com, (2009),. Crankshaft for inline 6. Online at: https://www.mo torera.com/ dictionary/pics/E/six-cyl_engine.jpg. Last Accesseed [1st march 10]. Clarkson, J. (2006),. LR Defender vehicle review. Online at: https://www.timesonline.co.u k/tol/driv ing/jeremy_clarkson/article656317.ece. Last Accessed [11th Feb 10]. Nunney, M J. (2006),. Light and Heavy Vehicle Technology , 4th ed. Butterworth-Heinemann. Richardson, D,.(2010) SI Engine Trends and Technology. Presentation made at University of Birmingham. Daniels. J, (2001), Modern Car Technology.Haynes Publishing.Unknown ed. UK Harris, W. (2002),. How superchargers work. Online at: https://auto.howstuffworks.com/su percharger6.htm. Last Accessed [15th Feb 10]. Author Unknown, Autoweek Magazine (2005),. Fuel Saving Technology. Online at: https://www .autoweek.com/apps/pbcs.dll/article?AID=/20051014/FREE/510140701.Last Accessed [16th Feb 10]. Author Unknown, DENSO. (2001),. Diesel Fuel Injection. Online at: https://www.denso.com .au/Pro ducts/Aftermarket-Automotive-Components/Diesel-Fuel-Injection. L. Accessed [10th Feb 10]. Stanton, J. (2009),.Euro-6 targets agreed.. Online: https://www.roadtransport.com/ Articles/2009/01/14/132710/euro-6-targets-agreed-but-brought-forward.html. Accessed [11th Feb 10]. Author Unknown, Torquecars.com, (2008),. Particulate filters and their impact . Online at: https://www.torquecars.com/tuning/particulate-filter.php. Last Accessed [11th Feb 10]. Author Unknown, Delphi (2008),. Diesel Engine Management Systems. Online at: https://d elphi.com/manufacturers/auto/powertrain/diesel/crfs/multecdcr/. Last Accessed [12th Feb 10] Bosch Automotive Handbook, (2007),. Automotive Handbook. Bentley. 7th ed. USA Author Unknown, mobilechiptune.co.uk, (2007),. ECU Remapping. Online at: https://mobilechiptune.co.uk/html/ecu_remapping.html. Last Accessed [12th Feb 10] Author Unknown, Mechadyne-int.com, (2006),. Impact of Variable Valve Train on. Online at: https://www.mechadyne-int.com/vva-reference/papers/the-impact-of-variable-valve-actuation-on-engine-performance-and-emissions.pdf. Last Accessed [10th Feb 10] Author Unknown, trolleycoalition.org (2002),. Diesel Particulate Filters. Online at: https://www.trolleycoalition.org/dpf.html. Last Accessed [16th February 10] Xu, H. (2009),. Engine Balancing, Powertrain Engineering Lecture Notes, the University of Birmingham, Stone, R. (1999),. Induction and exhaust processes, Introduction to Internal Combustion Engines 3rd Edition. Xu, H. (2009),. Valvetrain, Powertrain Engineering Lecture Notes, the University of Birmingham, Author Unknown, angelfire.com, (2007),. SOHC vs DOHC. Online at: https://www.angelfi re.com/hiphop3/ppddaiddddyy/SOHC.html. Last Accessed [16th February 10] Author Unknown, autocar.co.uk, (2007),. Land Rover Defender. Online at: https://www.auto car.co.uk/CarReviews/RoadTestsData/Land-Rover-Defender-90-2.4D-XS-Station-Wagon/225183/. Last Accessed [5th February 10] Author Unknown, carbuddy.com, (unknown). Defender. Online: https://www.carbuddy. com.au/ca r/values/specification/default.aspx?mk=LAND+ROVER. Accessed [5th February 10] Author Unknown, um.co.za, (2009),. Jeep Wrangler. Online: https://www.um.co.za/sp ecifications/jeep_wrangler_unlimited_2_8_crd_sahara_at_(2009).aspx. Accessed [5th February 10] Author Unknown, Mercedes.com, (2009),. G class w463. Online at: https://www.mercedes-benz.com.cn/content/china/mpc/mpc_china_website/enng/home_mpc/passengercars/home/new_cars/models/g-class/w463_crosscountry/technical_data.html. Last Accessed [5th February 10] Unknown Author, Edmunds.com, (2009),. MB G-Class. Online at: https://www.edmunds.com /mercedesbenz/gclass/2009/review.html. Last Accessed [5th February 10] Author Unknown, autocar.co.uk, (Date Unknown),. Land Rover Defender. Online at: https://www.autoc ar.co.uk/CarReviews/FirstDrives/Nissan-Patrol-GR-3.0-TD-S/210928/. Last Accessed [5th February 10] Author Unknown, carbuddy.com, (2000). Defender. Online at: https://www.carbuddy.com.au /car/values/specification/default.aspx?mk=NISSANmd=PATROLy=2000vs=DX~GU. Last Accessed [5th February 10] Author Unknown, Toyota.co.uk, (2006),. Land Cruiser Spec. Online at: https://www.toyota. co.uk/vs2/oldpdf/06/LC4_96_spec.pdf. Last Accessed [5th February 10] Kayne, R, (2009)., What is the difference between a 4 cylinder and 6 cylinder Engine. Online at: https://www.wisegeek.com/what-is-the-difference-between-a-4-and-6-cylinder-engine.htm. Last Accessed [20th February 10]. Williams, D, (2006)., Engine Weight/Size FYI. Online at: https://fixrambler.com/engineweig htchart.txt. Last Accessed {8th March 10]. Abeles, C. (2004)., Analysis of light-duty vehicle trends in the U.S. How Vehicle Prices changed Relative to Customers. Institute of transport studies. Team 12 Powertrain Engineering Project Stage 1 Engine 2 [Type text]0[Type text]0[Type text]

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